1. The Coulomb's force between a proton and an electron is 2.27x1039 times greater than the gravitational force. If the two forces were equal, what should the size of the elementary charge be A) 1.60 x 10:19 C B) 3.36 x 10-39 C C) 1.23 x 10-77 C D) 2.27 x 10-39 C E) 4.41 x 10-40 C
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